JP6536820B2 - Outdoor unit of air conditioner - Google Patents

Description

  The present invention relates to an outdoor unit of a multi-type air conditioner in which a plurality of indoor units are connected to one outdoor unit.

  In the outdoor unit of the air conditioner connecting multiple indoor units, a pair of gas refrigerant piping and liquid refrigerant piping are drawn from one outdoor unit, and connected to the multiple indoor units via separate flow dividing units There are two types, a single type and a multi-type in which one outdoor unit is equipped with a diversion unit.

  The basic configuration of both single type and multi type is almost the same, but in the single type, the gas side operation valve and the liquid side operation valve are connected via the valve plate on the front side of the machine chamber partitioned inside the main body casing. And a refrigerant pipe is connected thereto (see, for example, Patent Document 1).

  On the other hand, the multi-type outdoor unit changes a part of piping and structure based on the single type outdoor unit, provides the gas side operation valve and the liquid side operation valve on the side surface of the main body casing, and performs each operation At the tip of the valve, a flow dividing unit connected to refrigerant pipes of a plurality of indoor units is provided (see, for example, Patent Document 2).

  However, in the case where each operation valve is provided on the side surface of the main body casing as in Patent Document 2 and the diverting unit is assembled, the following problem occurs. That is, since each operating valve is disposed immediately below the flow dividing unit, the distance between each operating valve and the flow dividing unit can not be taken sufficiently. Therefore, the flow dividing unit is in the way and it is difficult to perform operations such as opening and closing of the operation valve, filling of the refrigerant, and evacuation of the piping.

  In addition, since the pipe length from the operation valve to the flow dividing unit is short and the pipe needs to be bent in a narrow space, the bending radius becomes small, and pressure loss occurs in the refrigerant flowing through the bent portion. As a result, the heat exchange efficiency may be reduced.

JP, 2011-38656, A JP, 2015-81746, A

  Therefore, the object of the present invention is to change to a multi-type outdoor unit simply by attaching a diversion unit without changing the basic structure of the single-type outdoor unit, thereby achieving common use of the outdoor unit. An object of the present invention is to provide an air conditioner outdoor unit that is cost effective and easy to maintain.

In order to solve the problems described above, the present invention relates to an outdoor unit of an air conditioner in which a gas side operation valve and a liquid side operation valve are attached via a valve plate on the front side of a machine chamber inside a main body casing.
On the side surface of the main body casing, a diversion unit to which refrigerant pipes of a plurality of indoor units are connected is attached,
The flow dividing unit is connected to the gas side operation valve and extends upward along the side of the main body casing and the gas connection portion extending from the pipe outlet provided on the side surface of the machine chamber through the machine chamber to the outside A gas refrigerant pipe provided with a gas header portion;
A liquid refrigerant comprising a metal pipe connected to the liquid side operation valve and having a liquid connection portion extending from the pipe outlet to the outside through the machine chamber and a liquid header portion extending upward along the side surface of the main body casing With piping
A gas branch pipe having a gas pipe connection port branched to a plurality from the gas header portion and connected to the gas pipe of the indoor unit at each tip thereof;
A liquid branch pipe having a liquid pipe connection port branched to a plurality from the liquid header portion and connected to the liquid pipe of the indoor unit at each tip;
Have a piping fixture the pipe is placed in the pull-out mouth the gas connection and the said liquid connection portion is inserted,
The piping outlet is formed by a notch formed by cutting a part of a lower end of the side panel provided on the machine chamber side of the main body casing and an upper side of a conduit panel attached to the lower end of the side panel. It is characterized in that the pipe fixing tool is fixed in a state of being pinched by the side panel and the conduit panel in the pipe outlet .

According to a preferred aspect of the present invention, the gas connection portion includes the first gas connection portion connected to the gas side operation valve, and the pipe at an end portion of the first gas connection portion at a first gas bending portion. A second gas connecting portion bent toward the back at the height position of the outlet and an end of the second gas connecting portion are horizontally bent toward the pipe outlet at the second gas bending portion And a third gas connection portion.

Further , the liquid connecting portion includes a first liquid connecting portion connected to the liquid side operation valve, and an end portion of the first liquid connecting portion at a first liquid bending portion, and a height position of the pipe outlet. And a third liquid connection portion formed by bending an end of the second liquid connection portion horizontally toward the pipe outlet at a second liquid bending portion. And.

  According to the present invention, the gas side operation valve and the liquid side operation valve attached to the front side of the machine chamber of the main casing are connected to a connection portion passing through the machine chamber to the pipe outlet provided on the side of the machine chamber By attaching a diversion unit having a refrigerant pipe having a header portion extending upward along the side surface of the main body casing from the pipe outlet, a multi-type outdoor unit can be simply and easily changed without changing the structure of the single type outdoor unit. As a result, commonality of parts and improvement of maintainability can be achieved.

The disassembled perspective view of the state which removed the piping cover of the outdoor unit of the air conditioner concerning one Embodiment of this invention. The right view of the state which removed the piping cover of the said outdoor unit. The perspective view which removes a service panel and shows the internal structure of the machine room of the said outdoor unit. The enlarged perspective view of the state which removed the service panel and the conduit panel, and looked at the distribution unit from the back side. The perspective view explaining the sealing structure of the refrigerant piping in a piping outlet.

  Next, embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited thereto.

  As shown in FIG. 1, the outdoor unit 1 of the air conditioner includes a rectangular parallelepiped main casing 2. The main casing 2 is disposed on the front side of the bottom plate 21 formed in a rectangular shape, the heat exchanger chamber HC, and the outlet panel 22 having the outlet grille 221 of the blower fan and the front side of the machine chamber MC. A service panel 24, a side panel 25 disposed from the right side surface to the back surface of the machine room MC, and a top plate 26 attached to the top surface of the main body casing 2 are provided.

  Referring also to FIG. 3, the inside of the main body casing 2 is divided by a partition plate 20 into a heat exchanger chamber HC having a heat exchanger and a blower fan (both not shown), mechanical units such as a compressor C, and electrical components It is divided into a machine room MC equipped with an item unit. In the present invention, the specific configuration of the heat exchanger chamber HC may be arbitrary, and the description thereof will be omitted.

  On the front side (the left front side in FIG. 3) of the machine chamber MC, a gas side operation valve VG and a liquid side operation valve VL of a refrigerant pipe drawn from the machine unit are attached via a valve plate 27. In this embodiment, a flare joint J is provided at each tip (lower end in FIG. 3) of the gas side operation valve VG and the liquid side operation valve VL.

  The gas side operation valve VG is provided at the end of the gas side pipe of the refrigeration cycle circuit (or defrost cycle circuit) provided in the machine chamber MC, and the liquid side operation valve VL is provided at the end of the liquid side pipe It is done.

  The valve plate 27 is a crank-like plate having two bent portions 271 and 272 at the center, and one end (left end in FIG. 3) is screwed to the partition plate 20, and the other end (right end in FIG. 3) Is screwed to the left end of the side panel 25.

  In this embodiment, the valve plate 27 is formed such that the right side is one level lower than the front side with respect to the left side, and the gas side operation valve VG and the liquid side operation valve VL are screwed in the one level lower side. . Thereby, when the service panel 24 is attached to the main body casing 2, the gas side operation valve VG and the liquid side operation valve VL do not interfere with the service panel 24.

  With reference to FIGS. 2 to 4 together, the side panel 25 has its lower end cut out in an L-shape from the side to the middle of the back, and the conduit panel 28 can be detachably attached to the panel mounting portion 251. It is attached.

  The conduit panel 28 is a panel for fixing to the main casing 2 the conduit pipe 281 through which the electrical signal line connecting the indoor unit and the electric component unit (not shown) located at the upper part of the machine room MC is inserted. In this embodiment, in addition to the number of indoor units to be connected, the conduit pipe 281 is provided with a conduit pipe 281 a that accommodates a power supply line. The back surface side of the conduit panel 28 is provided with a plurality of connection ports (not shown) to which the connection terminals 282 provided at the tip of the conduit tube 281 are locked. The conduit panel 28 has a height to which a plurality of electrical signal lines can be attached and which can be maintained.

  A notch 252 is provided at the lower end of the right side surface of the side panel 25. The notch portion 252 is a notch hole which is arched upward from the center lower end of the side panel 25. According to this, by attaching the conduit panel 28 to the lower end of the side panel 25, a pipe outlet H for drawing out the refrigerant pipes 4 and 5 of the flow dividing unit 3 described later is formed.

  The diverting unit 3 is attached to the side panel 25 via a unit attachment 31. The unit attachment 31 includes an anchor portion 311 fixed to an accumulator base (not shown) installed on the bottom plate 21, and a screw extending from the anchor portion 311 parallel to the side panel 25 and screwed to the side panel 25. A stopper portion 312 and a union fixing portion 313 which is vertically installed from one end of the screw portion 312 to the side panel 25 and to which the respective unions 432 and 532 of the branch pipes 43 and 53 are fixed.

  The flow dividing unit 3 includes a gas refrigerant pipe 4 connected to the gas side operation valve VG and a liquid refrigerant pipe 5 connected to the liquid side operation valve VL. They are both supported by the unit attachment 31 via the branch pipes 43 and 53.

  Referring also to FIG. 3, the gas refrigerant pipe 4 passes through the inside of the machine chamber MC and extends from the pipe outlet H to the outside through the gas connection portion 41 and the side surface of the main body casing 2 from the gas connection portion 41 (in FIG. And a gas header portion 42 extending upward along the right side), and is formed of one continuous metal pipe.

  The gas connection portion 41 includes a first gas connection portion 411 connected to the gas side operation valve VG and an end portion (lower end in FIG. 3) of the first gas connection portion 411 at a bending portion 414 (first gas bending) A second gas connecting portion 412 bent toward the back at the height position of the pipe outlet H, and an end portion (right end in FIG. 3) of the second gas connecting portion 412 at a bending portion 415 (second And a third gas connecting portion 413 which is horizontally bent toward the pipe outlet H). The bending position, number, shape, and processing method of the gas connection portion 41 may be arbitrarily selected.

  When attaching the flow dividing unit 3 to the main casing 2, a first relay pipe 416 is provided at an end (upper end in FIG. 3) of the first gas connection portion 411 to adjust an error of the attachment position.

  One end (upper end in FIG. 3) of the first relay pipe 416 is connected to the flare joint J of the gas side operation valve VG, and the other end (lower end in FIG. 3) is inserted into the enlarged diameter portion 411a of the first gas connection portion 411. And connected to the first gas connection portion 411 by brazing.

  Referring also to FIG. 4, the gas header portion 42 bends the tip end 413 a of the third gas connection portion 413 drawn out from the pipe outlet H by approximately 90 ° so as to be parallel along the side surface of the main body casing 2. The tip is extended toward the ceiling panel 26.

  In the gas header portion 42, a plurality of gas branch pipes 43 are disposed at predetermined intervals along the axial direction. In this embodiment, six gas branch pipes 43 are provided in one gas header portion 42. In other words, it can be connected to six indoor units.

  The base end side of the gas branch pipe 43 is brazed to the gas header portion 42. The gas branch pipe 43 is provided with a sensor holder 433 supporting a temperature sensor (not shown) that measures the temperature in the pipe. At the tip of the gas branch pipe 43, a gas side union 432 is provided to connect the gas branch pipe 43 and the refrigerant pipe from the indoor unit and to fix the connection portion to the union fixing portion 313. Further, at the tip of the gas side union 432, a gas side flare nut 431 for fixing the refrigerant pipe is provided.

  The liquid refrigerant pipe 5 extends upward along the side surface (right side surface in FIG. 1) of the main casing 2 from the pipe connection port 51 extending from the pipe outlet H to the outside through the inside of the machine chamber MC. It has a liquid header portion 52 to be provided, and is formed of one continuous metal pipe whose pipe diameter is smaller than that of the gas refrigerant pipe 4.

  The liquid connecting portion 51 includes a first liquid connecting portion 511 connected to the liquid side operation valve VL, and an end portion (lower end in FIG. 3) of the first liquid connecting portion 511 (a first liquid bending portion). A second liquid coupling portion 512 which is bent toward the back at the height position of the pipe outlet H, and an end (right end in FIG. 3) of the second liquid coupling portion 512 at a bending portion 515 (second And a third liquid connecting portion 513 which is horizontally bent toward the pipe outlet H). The bending position, number, shape, and processing method of the liquid connection portion 51 may be arbitrarily selected.

  When attaching the flow dividing unit 3 to the main body casing 2, a second relay pipe 516 is provided at the end (upper end in FIG. 3) of the first liquid connection portion 511 to adjust an error of the mounting position.

  The second relay pipe 516 has one end (upper end in FIG. 3) connected to the flare joint J of the liquid side operation valve VL, and the other end (lower end in FIG. 3) inserted into the enlarged diameter portion 511a of the first liquid connection portion 511. And is connected to the first liquid pipe 511 by brazing.

  Referring also to FIG. 2, the liquid header portion 52 is substantially 90 so that the tip portion 513 a of the third liquid connection portion 513 drawn from the pipe outlet H is parallel to the side surface of the main body casing 2. The end is bent toward the ceiling panel 26.

  In the liquid header portion 52, a plurality of liquid branch pipes 53 are disposed at predetermined intervals along the axial direction. In this embodiment, six liquid branch pipes 53 are provided in the liquid header portion 52. In other words, it can be connected to six indoor units.

  The base end side of the liquid branch pipe 53 is brazed to the liquid header portion 52. On the tip side of the liquid branch pipe 53, a liquid side union 532 is provided to connect the liquid branch pipe 53 and the refrigerant pipe from the indoor unit and to fix the connection portion to the union fixing portion 313. Further, a liquid side flare nut 531 for fixing the refrigerant pipe is provided at the tip of the liquid side union 532.

  The liquid branch pipe 53 is provided with a solenoid valve 533 for controlling the flow rate of the liquid refrigerant flowing through the liquid branch pipe 53. The amount of opening of the solenoid valve 533 is controlled by a control unit (not shown). A temperature sensor is also provided to the liquid branch pipe 53.

  In this embodiment, each of the refrigerant pipes 4 and 5 of the flow dividing unit 3 does not contact the side panel 25 while closing a part of the opening of the pipe outlet H in the pipe outlet H shown in FIGS. 3 and 5. Piping fixtures 7 are provided for this purpose.

  In this embodiment, as shown in FIG. 5, the pipe fixing member 7 is made of rubber, and the third connecting portion 413 of the gas refrigerant pipe 4 and the third liquid connecting portion 513 of the liquid refrigerant pipe 5 are inserted from the cut. Do. The piping fixture 7 is fixed to the piping support 33 spot-welded to the anchor portion 311 of the unit fixture 31 by the binding wire 71, and is sandwiched between the side panel 25 and the conduit panel 28, whereby each refrigerant piping 4, 5 is stably fixed.

  Referring again to FIG. 1, a pipe cover 6 that covers the diverting unit 3 is provided on the right side surface (dividing unit 3 side) of the main body casing 2. The piping cover 6 has an opening on the back side, and covers the whole except the back side of the diverting unit 3 exposed on the right side surface of the main body casing 2, and is fixed to the main body casing 2 by screwing ing.

  In the outdoor unit 1 of the present invention, the gas refrigerant piping and liquid refrigerant piping connected to the outdoor unit are drawn from the piping outlet H into the main casing 2 without assembling the flow dividing unit 3, and the gas side of the main casing 2 is By directly connecting the operation valve VG and the liquid side operation valve VL, it can be used as a single type outdoor unit.

  As described above, according to the present invention, the gas side operation valve and the liquid side operation valve attached to the front side of the machine chamber of the main body casing are connected to the piping provided through the machine chamber and connected to the side of the machine chamber. By attaching a diversion unit having a refrigerant pipe provided with a connecting part leading to the outlet and a header part extending upward along the side surface of the main body casing from the pipe drawing outlet, the structure of the single type outdoor unit can be easily changed. As a result, it is possible to achieve commonality of parts and improvement of maintainability.

  Furthermore, since each operation valve is disposed in the main body casing as in the single type, operations such as opening / closing of the operation valve, filling of the refrigerant, and evacuation of piping can be performed smoothly. In addition, piping design up to the piping outlet can be relaxed, bending processing can be performed under appropriate conditions, pressure loss does not occur in the refrigerant flowing through the refrigerant piping, and heat exchange efficiency does not decrease. .

DESCRIPTION OF SYMBOLS 1 outdoor unit 2 main body casing 21 bottom plate 22 blow-out panel 24 service panel 25 side panel 26 top plate 27 valve plate 28 conduit panel 3 diverting unit 31 unit attachment 4 gas refrigerant piping 41 gas connecting portion 42 gas header portion 43 gas branch pipe 5 liquid Refrigerant piping 51 Liquid connection part 52 Liquid header part 53 Liquid branch pipe 6 Piping cover 7 Piping fixture VG Gas side operation valve VL Liquid side operation valve H Piping outlet

Claims (3)

In an outdoor unit of an air conditioner in which a gas side operation valve and a liquid side operation valve are attached via a valve plate on the front side of a machine chamber inside a main body casing,
On the side surface of the main body casing, a diversion unit to which refrigerant pipes of a plurality of indoor units are connected is attached,
The flow dividing unit is connected to the gas side operation valve and extends upward along the side of the main body casing and the gas connection portion extending from the pipe outlet provided on the side surface of the machine chamber through the machine chamber to the outside A gas refrigerant pipe provided with a gas header portion;
A liquid refrigerant comprising a metal pipe connected to the liquid side operation valve and having a liquid connection portion extending from the pipe outlet to the outside through the machine chamber and a liquid header portion extending upward along the side surface of the main body casing With piping
A gas branch pipe having a gas pipe connection port branched to a plurality from the gas header portion and connected to the gas pipe of the indoor unit at each tip thereof;
A liquid branch pipe having a liquid pipe connection port branched to a plurality from the liquid header portion and connected to the liquid pipe of the indoor unit at each tip;
Have a piping fixture the pipe is placed in the pull-out mouth the gas connection and the said liquid connection portion is inserted,
The piping outlet is formed by a notch formed by cutting a part of a lower end of the side panel provided on the machine chamber side of the main body casing and an upper side of a conduit panel attached to the lower end of the side panel. An outdoor unit of an air conditioner according to claim 1, wherein the pipe fixing member is fixed in a state of being pinched by the side panel and the conduit panel in the pipe outlet.   The gas connection portion includes a first gas connection portion connected to the gas side operation valve, and an end portion of the first gas connection portion at a height position of the pipe outlet at a first gas bending portion. And a third gas connection portion formed by bending an end of the second gas connection portion horizontally toward the pipe outlet at the second gas bending portion. The outdoor unit of an air conditioner according to claim 1, wherein the outdoor unit is provided.   The liquid connection portion includes a first liquid connection portion connected to the liquid side operation valve, and an end portion of the first liquid connection portion at a height position of the pipe outlet at a first liquid bending portion. And the third liquid connection portion formed by bending the end of the second liquid connection portion horizontally toward the pipe outlet at the second liquid bending portion. The outdoor unit of an air conditioner according to claim 1, wherein the outdoor unit is provided.

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